A novel multilayer terahertz metamaterial composed of double rectangle, vertical single rectangle, vertical double rectangle and single rectangle graphene layer is proposed. The dynamic adjustable triple plasmon induced transparency (PIT) is realized by coupling two bright modes and two dark modes, which is an especial synergy effect between two single-PIT. Coupled mode theory contained four resonators is employed to explain the triple-PIT, and the theoretical results exhibit excellent consistency with finite-difference time-domain. Surprisingly, the triple-PIT can evolve into a dual-PIT or a single-PIT only by changing the Fermi level of graphene, and the amplitude modulation degrees at the four resonance frequencies of the triple-PIT are 74.7%, 87.8%, 76.5%, and 77.7%, respectively. In addition, a simultaneous switching at multiple frequencies is realized by adjusting different Fermi levels. Therefore, this study not only lays the foundation for explaining phenomenon of the tr...

中文翻译：

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多层图案化石墨烯太赫兹超材料中多个频率的同时切换和三等离激元引起的透明性

提出了一种由双矩形，垂直单矩形，垂直双矩形和单矩形石墨烯层组成的多层太赫兹超材料。动态可调三等离激元诱导的透明性（PIT）是通过耦合两个亮模式和两个暗模式来实现的，这是两个单PIT之间的特殊协同效应。用包含四个谐振器的耦合模式理论来解释三重PIT，理论结果与时域有限差分具有很好的一致性。出乎意料的是，仅通过改变石墨烯的费米能级，三重PIT就可以演变为双重PIT或单重PIT，并且三重PIT的四个共振频率处的振幅调制度分别为74.7％，87.8％，76.5。 ％和77.7％。此外，通过调节不同的费米能级，可以同时切换多个频率。因此，本研究不仅为解释这一现象奠定了基础。